Project Overkill

Adds the 4x4 advanced crafting table with server-side recipe validation and a tested 16-ingredient recipe. Adds the Cave Crawler, Filon Guardian, and Void Colossus with combat abilities, rewards, 3D spawn eggs, and natural spawns. Adds Void materials, three weapons with distinct effects, and four armor pieces with a full-set bonus. Adds original multi-part Blockbench models for the Void weapons, armor, and spawn eggs while preserving the existing Ruby gear models. Verified Forge, Fabric, and NeoForge builds for Minecraft 26.3; Forge GameTest passed.